A researcher selects a sample of 100 people to investigate the relationship between gender (male/female) and registering to vote. The sample consists of 40 females, of whom 30 are registered voters, and 60 males, of whom 40 are registered voters. If these data were used for a chi-square test for independence, what is the observed frequency for registered males? a. 28 b. 42 c. 12 d. ​40

Difference tests are conducted to determine: A. the representative value in a given set of scores. B. whether two or more groups differ on an outcome. C. if the assumptions of a statistical procedure have been met. D. whether two variables correlate with each other.

Read the study below carefully.  Then answer the questions that follow by typing in the letter of the correct response.   Rhianna hears that watching ASMR videos on YouTube can help with insomnia.  She conducts a sleep study on 60 people who have difficulty sleeping by asking a simple random sample of 30 participants to watch at least 20 minutes of ASMR videos prior to sleeping and the remaining 30 participants to attempt to sleep without watching any videos.  During the study, the subjects are connected to an EEG machine, which is used to measure brain activity.  Rhianna analyzes the EEG results and concludes that those who watched the ASMR videos experienced a better quality of sleep than those who did not.   i.   Identify the treatments in Rhianna’s study. A.   being connected to an EEG machine B.   experiencing difficulty sleeping C.   watching at least 20 minutes of ASMR videos D.   watching at least 20 minutes of non-ASMR videos E.    watching no videos prior to sleep F.    all…

Sharon is interested in testing the differences between student populations at two different universities. If she randomly selects students from both universities, she is examining _____ sample(s). a. confounded   b. independent   c. single   d. dependent